A rapid testing device for the elongation rate of elastic fabrics

Abstract

This utility model relates to the field of textile equipment technology, specifically to a rapid testing device for the tensile strength of elastic fabrics. The device includes a frame, a material guiding mechanism, and a loading mechanism. The material guiding mechanism comprises a first and a second set of guide rollers. The loading mechanism includes a loading rod and a linear drive. One end of the linear drive is connected to the frame, and the other end is hinged to the loading rod. A pressure sensor is mounted on the loading rod. Through this design, the linear drive, controlled by a program, can precisely execute pressure loading, pressure holding time control, and unloading actions, completely replacing manual bidirectional tensile testing. This thoroughly solves the problems of inconsistent testing speed and unstable pressure holding time, ensuring completely consistent testing conditions for each test.

Description

Technical Field

[0001] This utility model relates to the field of textile equipment technology, and more specifically, to a rapid testing device for the tensile strength of elastic fabrics. Background Technology

[0002] Elastic fabric is a technology that uses specific weaving and finishing processes to make the fabric elastic. This technology allows the fabric to adapt to body movements, providing a comfortable wearing experience without feeling restrictive due to stretching or bending. The finishing processes for elastic fabrics mainly include heat setting, dyeing, softening, and antistatic treatment. These finishing processes can affect the fabric's elastic recovery, hand feel, color stability, and durability. Heat setting fixes the elastic dimensions of the fabric, allowing it to maintain good elasticity after multiple wears and washes. After finishing processes, elastic fabrics need to be tested for elongation. Existing methods for testing the elongation of elastic fabrics typically involve randomly selecting fabric pieces on a spreading machine and manually stretching them bidirectionally 50 times, observing for yarn breakage, permanent deformation, or cracking. Because manual testing results in inconsistencies in speed and holding time, the results are only relative. Therefore, it is necessary to develop a highly automated and easy-to-use device for testing the elongation of elastic fabrics. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a rapid testing device for the tensile strength of elastic fabrics, aiming to provide a highly automated and easy-to-use device for testing the tensile strength of elastic fabrics.

[0004] A rapid testing device for the tensile strength of elastic fabrics according to an embodiment of the present invention includes:

[0005] frame;

[0006] The material guiding mechanism includes a first guide roller group and a second guide roller group. The first guide roller group includes a first fixed roller and a first adjusting roller. The first fixed roller is rotatably connected to the frame, and the first adjusting roller can move closer to or further away from the first fixed roller in a vertical direction. The second guide roller group includes a second fixed roller and a second adjusting roller. The second fixed roller is rotatably connected to the frame, and the second adjusting roller can move closer to or further away from the second fixed roller in a vertical direction.

[0007] A loading mechanism is provided, which is disposed between the first guide roller group and the second guide roller group; the loading mechanism is provided with a loading rod and a linear drive, one end of the linear drive is connected to the frame, the other end of the linear drive is hinged to the loading rod, and a pressure sensor is provided on the loading rod.

[0008] According to some embodiments of this utility model, the cross-section of the loading rod is an inverted conical structure, and guide rounded corners are provided at the edges and corners of the loading rod.

[0009] According to some embodiments of the present invention, the pressure sensor is disposed on the guide fillet at the lower end of the loading rod.

[0010] According to some embodiments of the present invention, the pressure sensor is disposed on the inclined surfaces on both sides of the loading rod.

[0011] According to some embodiments of this utility model, the linear drive is a linear cylinder or an electric cylinder.

[0012] According to some embodiments of the present invention, the first guide roller assembly includes a first cylinder and a first mounting frame. The first cylinder is fixedly connected to the frame, and the output end of the first cylinder passes through the frame and is fixedly connected to the first mounting frame. The first adjusting roller is connected to the first mounting frame by a bearing. A first guide rod is provided on the first mounting frame, and the first guide rod is slidably connected to the frame.

[0013] According to some embodiments of the present invention, the second guide roller assembly includes a second cylinder and a second mounting frame. The second cylinder is fixedly connected to the frame, and the output end of the second cylinder passes through the frame and is fixedly connected to the second mounting frame. The second adjusting roller is connected to the second mounting frame by a bearing. A second guide rod is provided on the second mounting frame, and the second guide rod is slidably connected to the frame.

[0014] According to some embodiments of the present invention, both the first guide rod and the second guide rod are provided with a limit block and a buffer spring. The buffer spring is sleeved on the first guide rod or the second guide rod, with one end of the buffer spring abutting against the limit block and the other end of the buffer spring abutting against the frame.

[0015] A rapid testing device for the tensile strength of elastic fabrics according to an embodiment of the present invention has at least the following beneficial effects:

[0016] According to the present invention, the rapid testing device for the tensile strength of elastic fabrics includes a frame, a guiding mechanism, and a loading mechanism. The guiding mechanism comprises a first guiding roller group and a second guiding roller group. The first guiding roller group includes a first fixed roller and a first adjusting roller. The first fixed roller is rotatably connected to the frame, and the first adjusting roller can move closer to or further away from the first fixed roller in a vertical direction. The second guiding roller group includes a second fixed roller and a second adjusting roller. The second fixed roller is rotatably connected to the frame, and the second adjusting roller can move closer to or further away from the second fixed roller in a vertical direction. The loading mechanism is located between the first and second guiding roller groups. The loading mechanism includes a loading rod and a linear drive. One end of the linear drive is connected to the frame, and the other end is hinged to the loading rod. A pressure sensor is mounted on the loading rod. Through this structural design, the linear drive, controlled by a program, can precisely execute pressure loading, pressure holding time control, and unloading actions, completely replacing manual bidirectional tensile testing. This thoroughly solves the problems of inconsistent testing speed and unstable pressure holding time in manual testing, ensuring completely consistent testing conditions for each test. Meanwhile, the test data is objective and accurate. The pressure sensor integrated into the loading rod can monitor and control the actual applied pressure in real time, ensuring that the load in each test accurately reaches the preset value. At the same time, the system automatically records the tensile displacement and calculates the elongation rate, eliminating subjective errors from manual interpretation and making the test results repeatable and comparable. Furthermore, it is easy to operate and highly adaptable. The vertical adjustment design of the first and second adjusting rollers can quickly adapt to fabrics of different thicknesses. The entire testing process is completed automatically on a single device, significantly improving testing efficiency and providing an efficient and reliable testing method for the quality control of elastic fabrics. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0019] In the picture:

[0020] 100-rack;

[0021] 200 - Material guiding mechanism, 210 - First material guiding roller group, 211 - First fixed roller, 212 - First adjusting roller, 213 - First cylinder, 214 - First mounting frame, 215 - First guide rod, 220 - Second material guiding roller group, 221 - Second fixed roller, 222 - Second adjusting roller, 223 - Second cylinder, 224 - Second mounting frame, 225 - Second guide rod, 230 - Limiting block, 240 - Buffer spring;

[0022] 300 - Loading mechanism, 310 - Loading rod, 311 - Inverted conical structure, 312 - Guide fillet, 320 - Linear drive. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] Reference Figure 1 and Figure 2As shown, this utility model discloses a rapid testing device for the tensile strength of elastic fabrics. The rapid testing device for the tensile strength of elastic fabrics includes a frame 100, a material guiding mechanism 200, and a loading mechanism 300. The material guiding mechanism 200 is provided with a first material guiding roller group 210 and a second material guiding roller group 220. The first material guiding roller group 210 is provided with a first fixed roller 211 and a first adjusting roller 212. The first fixed roller 211 is rotatably connected to the frame 100, and the first adjusting roller 212 can move closer to or further away from the first fixed roller 211 in the vertical direction. The second material guiding roller group 220... The frame 100 is equipped with a second fixed roller 221 and a second adjusting roller 222. The second fixed roller 221 is rotatably connected to the frame 100, and the second adjusting roller 222 can move closer to or further away from the second fixed roller 221 in the vertical direction. A loading mechanism 300 is disposed between the first guide roller group 210 and the second guide roller group 220. The loading mechanism 300 is equipped with a loading rod 310 and a linear drive 320. One end of the linear drive 320 is connected to the frame 100, and the other end of the linear drive 320 is hinged to the loading rod 310. A pressure sensor is disposed on the loading rod 310. Specifically, in this embodiment, the elastic fabric to be tested is first passed through the first guide roller group 210, the loading rod 310, and the second guide roller group 220 in sequence. The first adjusting roller 212 is adjusted to move closer to the first fixed roller 211 in the vertical direction to clamp one end of the fabric, while the second adjusting roller 222 is adjusted to move closer to the second fixed roller 221 in the vertical direction to clamp the other end of the fabric, ensuring that the fabric remains flat and taut in the test area. After the test is initiated, the linear drive 320 of the loading mechanism 300 begins operation, pushing the loading rod 310, which is hinged to it, to apply pressure perpendicular to the fabric surface. At this time, the pressure sensor on the loading rod 310 monitors and reports the applied pressure value in real time. When the pressure reaches the preset test value, the linear drive 320 stops operating and maintains the pressure constant for a certain period. During this process, the fabric undergoes bidirectional tensile deformation. The system accurately measures the tensile displacement of the fabric under the fixed pressure using a displacement sensor or encoder, thereby calculating the fabric's elongation index. After the pressure holding test is completed, the linear drive 320 automatically resets and releases the pressure. The system then observes whether the fabric exhibits yarn breakage, permanent deformation, or cracking, and records the results.

[0028] In this embodiment, the linear drive 320, through program control, can precisely execute pressure loading, pressure holding time control, and unloading actions, completely replacing manual bidirectional stretching operations. This thoroughly solves the problems of inconsistent testing speeds and unstable pressure holding times, ensuring completely consistent testing conditions for each test. Simultaneously, the test data is objective and accurate. The pressure sensor integrated in the loading rod 310 can monitor and control the actual applied pressure in real time, ensuring that the load accurately reaches the preset value for each test. The system automatically records the stretching displacement and calculates the stretching rate, eliminating subjective errors from manual interpretation and making the test results repeatable and comparable. Furthermore, it is convenient to operate and highly adaptable. The vertical adjustment design of the first adjusting roller 212 and the second adjusting roller 222 can quickly adapt to fabrics of different thicknesses. The entire testing process is automatically completed on a single device, significantly improving testing efficiency and providing an efficient and reliable testing method for the quality control of elastic fabrics.

[0029] In some embodiments of this utility model, the loading rod 310 has an inverted conical cross-section 311, and guide rounded corners 312 are provided at all corners of the loading rod 310. Specifically, in this embodiment, during the test, when the linear drive 320 pushes the loading rod 310 downward to contact the elastic fabric, the inverted conical structure 311 of the loading rod 310 causes its tip to contact the central area of ​​the fabric first. As the linear drive 320 continues to apply load, the inverted conical cross-section causes the contact area between the loading rod 310 and the fabric to gradually increase, expanding from an initial small contact point to a larger annular contact surface. This expansion process is naturally controlled by the taper of the loading rod 310, ensuring that the pressure diffuses evenly to the outer periphery in a centrally symmetrical manner. At the same time, the guide rounded corners 312 provided at all corners of the loading rod 310 play a key role at the moment of contact with the fabric. The continuous smooth transition surface formed by the rounded corners completely eliminates the risk of sharp edges scratching the yarn. When the loading rod 310 presses into the fabric, these rounded corners guide the fabric fibers to slide smoothly along the curved surface, avoiding the fibers being hooked or cut by sharp edges. During the pressure holding stage, the stable support surface formed by the inverted conical structure 311 maintains full contact with the fabric, ensuring that the pressure data collected by the pressure sensor accurately reflects the uniformly distributed stress state of the fabric. Through this structural design, the guide rounded corner 312 eliminates all sharp edges, preventing the loading rod 310 from snagging or cutting the fabric yarns, thus maximizing the protection of the sample integrity. The guide rounded corner 312 structure significantly reduces the sliding friction resistance between the loading rod 310 and the fabric, allowing the fabric to undergo more free bidirectional tensile deformation under pressure, avoiding abnormal deformation modes caused by friction interference, and ensuring that the tensile displacement measurement accurately reflects the fabric's elastic properties.

[0030] In some embodiments of this invention, the pressure sensor is disposed on the guide radius 312 at the lower end of the loading rod 310. Specifically, in this embodiment, the sensor is disposed at the foremost point of the loading rod 310's movement, ensuring that data acquisition begins immediately upon contact, providing real-time feedback to the control system, enabling the pressure loading process to have millisecond-level response capability, and significantly improving pressure control accuracy. Furthermore, since the pressure sensor is located in the fabric area where bidirectional tensile deformation actually occurs, the pressure data it collects directly corresponds to the mechanical response of the sample, ensuring that the elongation calculation is based on the actual force, guaranteeing the physical authenticity of the test results.

[0031] In some embodiments of this invention, pressure sensors are disposed on the inclined surfaces on both sides of the loading rod 310. Specifically, in this embodiment, the pressure sensors synchronously arranged on both inclined surfaces form a distributed measurement network, which can accurately capture the spatial distribution characteristics of pressure on the fabric surface and avoid misjudgment due to local stress concentration caused by single-point measurement. Secondly, the dual-sensor configuration has a real-time symmetry detection function. When the fabric undergoes non-uniform deformation, the system can immediately identify the pressure difference between the two sides and trigger posture compensation, fundamentally eliminating test errors caused by sample installation deviations or material anisotropy.

[0032] In some embodiments of this utility model, the linear drive 320 is a linear cylinder or an electric cylinder. Specifically, in this embodiment, the linear cylinder or electric cylinder is the core component of the linear drive 320, and its advantages are mainly reflected in precise execution and efficient control. Through programmed control, the pressing speed, applied load, and holding time of the loading rod 310 can be precisely set, ensuring that the loading conditions are strictly consistent for each test, completely solving the problem of speed and time fluctuations in manual operation. At the same time, its stable output characteristics and rapid response capability can follow the feedback signal of the pressure sensor in real time, realizing closed-loop dynamic adjustment of the load, ensuring the constant pressure value and uniform distribution during the test. This design significantly improves testing efficiency, simplifies maintenance procedures, and extends the service life of the equipment.

[0033] In some embodiments of this utility model, the first guide roller group 210 includes a first cylinder 213 and a first mounting frame 214. The first cylinder 213 is fixedly connected to the frame 100, and the output end of the first cylinder 213 passes through the frame 100 and is fixedly connected to the first mounting frame 214. The first adjusting roller 212 is connected to the first mounting frame 214 by a bearing. A first guide rod 215 is provided on the first mounting frame 214, and the first guide rod 215 is slidably connected to the frame 100. Specifically, in this embodiment, the first cylinder 213 is fixedly connected to the frame 100, and its output end passes through the frame 100 and is rigidly connected to the first mounting frame 214. When the first cylinder 213 is started, the output end pushes the first mounting frame 214 to move vertically, causing the first adjusting roller 212, which is connected to the first mounting frame 214 by a bearing, to move synchronously, thereby achieving rapid approach or departure from the first fixed roller 211. The first guide rod 215 is fixedly connected to the first mounting frame 214 and forms a sliding engagement with the guide hole or slide rail on the frame 100. When the cylinder is activated, it strictly constrains the movement trajectory of the first mounting frame 214, ensuring that the first adjusting roller 212 always moves smoothly in the vertical direction. During this process, the first adjusting roller 212 and the first fixed roller 211 work together to apply a uniform clamping force to the elastic fabric passing between them.

[0034] In some embodiments of this utility model, the second guide roller assembly 220 includes a second cylinder 223 and a second mounting frame 224. The second cylinder 223 is fixedly connected to the frame 100, and the output end of the second cylinder 223 passes through the frame 100 and is fixedly connected to the second mounting frame 224. The second adjusting roller 222 is connected to the second mounting frame 224 by bearings. A second guide rod 225 is provided on the second mounting frame 224, and the second guide rod 225 is slidably connected to the frame 100. The second cylinder 223 is fixedly connected to the frame 100, and its output end passes through the frame 100 and is rigidly connected to the second mounting frame 224. When the second cylinder 223 is activated, its output end pushes the second mounting frame 224 to move vertically, causing the second adjusting roller 222, which is connected to the second mounting frame 224 by bearings, to move synchronously, thereby achieving rapid approach or departure from the second fixed roller 221. The second guide rod 225 is fixedly connected to the second mounting bracket 224 and forms a sliding engagement with the guide hole or slide rail on the frame 100. When the cylinder is activated, it strictly constrains the movement trajectory of the second mounting bracket 224, ensuring that the second adjusting roller 222 always moves smoothly in the vertical direction. During this process, the second adjusting roller 222 and the second fixed roller 221 work together to apply a uniform clamping force to the elastic fabric passing between them.

[0035] In some embodiments of this utility model, a limit block 230 and a buffer spring 240 are provided on both the first guide rod 215 and the second guide rod 225. The buffer spring 240 is sleeved on the first guide rod 215 or the second guide rod 225, with one end of the buffer spring 240 abutting against the limit block 230 and the other end abutting against the frame 100. Specifically, in this embodiment, when the first cylinder 213 drives the first mounting frame 214 to move the first adjusting roller 212 vertically, the limit block 230 fixed on the first guide rod 215 moves synchronously with the mounting frame. When the mounting frame approaches the preset end point of the stroke, one end of the buffer spring 240 sleeved on the guide rod contacts the frame 100 first. As the cylinder continues to advance, the spring begins to compress and generates increasing elastic resistance. During this process, the buffer spring 240 absorbs the remaining kinetic energy of the cylinder through elastic deformation until the movement completely stops when the limit block 230 contacts the frame 100, at which point the spring is in its maximum compression state. During the cylinder's return stroke, the compressed buffer spring 240 releases its stored energy, propelling the mounting bracket to start smoothly and preventing mechanical vibration caused by sudden retraction. The second guide rod 225 of the second guide roller assembly 220 executes the same action logic, ensuring that the two roller assemblies achieve synchronous soft landing and smooth reset.

[0036] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A rapid testing device for the tensile strength of elastic fabrics, characterized in that, include: Rack (100); A material guiding mechanism (200) is provided with a first material guiding roller group (210) and a second material guiding roller group (220). The first material guiding roller group (210) is provided with a first fixed roller (211) and a first adjusting roller (212). The first fixed roller (211) is rotatably connected to the frame (100). The first adjusting roller (212) can move closer to or away from the first fixed roller (211) in the vertical direction. The second material guiding roller group (220) is provided with a second fixed roller (221) and a second adjusting roller (222). The second fixed roller (221) is rotatably connected to the frame (100). The second adjusting roller (222) can move closer to or away from the second fixed roller (221) in the vertical direction. A loading mechanism (300) is disposed between the first guide roller group (210) and the second guide roller group (220); the loading mechanism (300) is provided with a loading rod (310) and a linear drive (320), one end of the linear drive (320) is connected to the frame (100), the other end of the linear drive (320) is hinged to the loading rod (310), and a pressure sensor is provided on the loading rod (310).

2. The rapid testing device for the tensile strength of elastic fabrics according to claim 1, characterized in that, The cross-section of the loading rod (310) is an inverted conical structure (311), and the corners of the loading rod (310) are provided with guide fillets (312).

3. The rapid testing device for the tensile strength of elastic fabrics according to claim 2, characterized in that, The pressure sensor is disposed on the guide fillet (312) at the lower end of the loading rod (310).

4. The rapid testing device for the tensile strength of elastic fabrics according to claim 2, characterized in that, The pressure sensor is disposed on the inclined surfaces on both sides of the loading rod (310).

5. The rapid testing device for the tensile strength of elastic fabrics according to claim 3 or 4, characterized in that, The linear drive (320) is a linear cylinder or an electric cylinder.

6. The rapid testing device for the tensile strength of elastic fabrics according to claim 1, characterized in that, The first guide roller assembly (210) includes a first cylinder (213) and a first mounting frame (214). The first cylinder (213) is fixedly connected to the frame (100). The output end of the first cylinder (213) passes through the frame (100) and is fixedly connected to the first mounting frame (214). The first adjusting roller (212) is connected to the first mounting frame (214) by a bearing. A first guide rod (215) is provided on the first mounting frame (214). The first guide rod (215) is slidably connected to the frame (100).

7. The rapid testing device for the tensile strength of elastic fabrics according to claim 6, characterized in that, The second guide roller assembly (220) includes a second cylinder (223) and a second mounting frame (224). The second cylinder (223) is fixedly connected to the frame (100). The output end of the second cylinder (223) passes through the frame (100) and is fixedly connected to the second mounting frame (224). The second adjusting roller (222) is connected to the second mounting frame (224) by a bearing. A second guide rod (225) is provided on the second mounting frame (224). The second guide rod (225) is slidably connected to the frame (100).

8. The rapid testing device for the tensile strength of elastic fabrics according to claim 7, characterized in that, Both the first guide rod (215) and the second guide rod (225) are provided with a limit block (230) and a buffer spring (240). The buffer spring (240) is sleeved on the first guide rod (215) or the second guide rod (225). One end of the buffer spring (240) abuts against the limit block (230), and the other end of the buffer spring (240) abuts against the frame (100).

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